Shock and vibration absorbing and damping device



Oct. 4, 1932. H. J. WEYDERT 1,881,155

SHOCK AND VIBRATION ABSORBING AND DAM PING DEVICE Filed Dec. 6, 1928 2 1311 JZZgQ Patented Oct. 4, 1932 HUBERT JULES WEYDERT, OF LEVALLOIS FERRET, FRANCE SHOCK AND VIBRATION ABSORBING AND "DAMIPING DEVICE Application filed December 6, 1928, Serial No. 324,266, and in France December 31, 1927.

It is necessary in respect of each individual element, not to exceed a certain height (proportional to the diameter and practically equal to 1.10 times this) if buckling is to be avoided. Hence there is necessity of em ploying for a considerable movement a series of superposed elements separated by guiding washers with central bearings if internal guides are used or with peripheral bearings if external guiding is adopted.

The improvement forming the object of the present invention aims at obviating this inconvenience and consists in employing helicoidal elements of large size and using only part thereof for covering the rubber.

Hence part of the helicoidal element is left free: and one of its edges, the interior or exterior forms the guiding means. It is thus possible to make elements which are very long, and which avoid the need of superposing ordinary elements when large movement is required. Further. as the guiding takes place over the whole length there is no risk 9 of buckling.

- Thisimprovement will be better understood by reference to the accompanying drawing in which Fig. Iis a sectional .view of a device according to said Patent No. 1,679,698.

Fig. 2 is a similar view of my improved device.

Fig. 3 is a similar view of a modified form of my improved device.

According to the arrangement proposed in the parent case, and shown in Fig. 1 the rubber elements a, a, a" were supposed threaded upon a common guide 6, internal or external, as required with play a suiiicient to' permit of the variations of diameter at the moment of applying the charge, the mass of rubber tending to crease and form-internal pndiulations as well as external ones, under The guiding was then obtained by Washers cl isolating the elements one from the other and having shoulders filling, in the case shown (Fig. 1) internal guiding, the play 0 provided between the rubber block and the guiding member.

Being only guided at its extremities, the element a could not be given a greater height or length than from 1.10 to 1.20 of its diameter. This often necessitated the use of a whole series of elements a, a, a

In the present invention, however, the aim is to realize the guiding of the tubular oompressible element 72. over the entire height of these elements so as'to avoid any risk of wobbling and indirectly to permit in this manner the utilization of elements of very great height. This was not possible in the prior devices.

For this purpose the helicoidal element f formed of a very thin plate rolled flat into helical shape is selected for the great length, Figures 2 and 3, and a portion only of this size is embedded in the mass of rubber of the element It.

The helicoidal element 7, therefore. rests in bare condition on a portion 9 and proiects beyond the rubber mass and this proiecting portion 9 is utilized for guiding the element It, the guiding device being formed by a tube 6 placed concentrically with resnect to the element 71. either in the center thereof or on the outside thereof.

In the construction. shown in Figure 2, the portion of the helicoidal element 7 also projects towards the center beyond the rubber mass while in the construction shown in Fig. 3 the part 9 of the reinforcement left blank projects beyond the periphery and beyond the mass of rubber. In each of such constructions the border 9 touches the guiding element 6.

Owing to this guiding element extending over the entire height the shock absorber can [2 p s nausea therefore be made of a single rubber element k ofa length as great as required because the guiding is effected along-the whole length of the element on th'e'edg'e (whether internal or 6' external) of the helicoidal element without interruption instead of, as previously, solely at the ends ofeach element.

At the same time all risk of buckling is avoided.

10 My improved shock absorber is of maximum efliciency and modifications may" be" made therein w1thin the scope of the appended claim. a 1

What I claim is 15 A shock absorber comprising a guide element and a continuous tubular elementof elastic compressible material such as rubber and a continuous helicoidal' reinforcing memher in said compressible tubular element, the

20 convolutions of said helicoidal member being appropriately spaced apart and each partly embedded in the material of the tubular element and partly projecting therefrom toward the guide element and resenting edge sur- 25 faces for contact with t e guide element.

In witness whereof I aflix my si ature.

HUBERT JULES WE ER'I. 

